134 BRITISH COPEPODA. 
seta near the base, and four more towards the apex, 
from which spring three sete, one much larger than 
the others. Last abdomina lsegment very short, tail- 
seoments (fig. 11) about thrice as long, tapering 
towards the apex and armed with a row of serratures 
along the greater part of the.outer margin. Second 
foot of the male like that of the following species 
(T. hibernica). The limbs are all short, but the first 
pair of feet are longer than the others. Length 
jsth of an inch (1'7 mm.). | 
IT have seen only one specimen—a male—of this 
species, which was dredged on a bottom of muddy 
sand in New Grimsby Harbour, Scilly; depth fourteen 
fathoms. The characters of the posterior foot-jaw and 
tail-seements are abundantly sufficient to distinguish 
it from any described species. 
8, THALESTRIS HIBERNICA, Brady and Robertson. Pl. LXILI, 
figs. 13—17/, and Pl. LXITI, 
fies. 14, 15. 
Thalestris hibernica, B. & R. Ann. and Mag. Nat Hist., ser. 4, 
vol, xii, p. 155, pl. viii, figs. 17—19 (1878). 
Body slender, rostrum of considerable length. 
Anterior antennee 9-jointed, of moderate length, rather 
thickly clothed along the anterior margin with shortish 
hairs ; second, third, and fourth joints nearly equal, 
about twice as long as broad; fifth, sixth, seventh, 
and ninth also nearly equal, and about half the length 
